Pile compressing means for paper cutting machines and the like



K. STEGMANN 1,880,159

P ILE COMPRESSING MEANS FOR PAPER CUTTING MACHINES AND THE LIKE Filed Aug. '7. 1930 costly simple machines the operator, 30' change the position of his hands at least four Patented Sept. 27,

{UNITED sm PATENii cert KARL sT-EGMANN, or IBA'UTZEN, GERMANY, ASSIGNOR To JOHNE-WERK MASCI-IINEN-AKTIENGESELLSCHAFT, or nanrznn, GERMANY ennrrscnu mm oomrnnssnve MEANS FOR- rerun onrrnve MACHINES AND run ma 7 Application filed August 7, iesojserial no.

This invention has reference to cutting machines for paper,cardboardand the like and in particular to pressing means for the purpose of securing in position the piles of paper or cardboard which are to be submitted to the cutting operation, and it is intended to facilitate the manipulation and increase the accuracy of devices of the kind referred to. Broadly considered the invention is particularly adapted to machines of this kind with manually operated screw shafts and the like. For the purposes referred to highly expensive superior grades of modern ma- 7 chines with great efficiency and possessing 18 automatic power-driven presslng means and the like have been constructed, but aside from these expensive and complicated kinds of machinery the trade, and particularly smaller kinds of printing establishments require less which however should possess likewise a very satisfactory comparatively high rate of efficiency. In the devices heretofore suggested for this purpose the compression of the pile was effected 2S manually by means of a screw shaft or a screw spindle and, in order to produce the compression several revolutions of the hand wheel had to be performed, so as to require when using both hands to times in the grasping and the operation of the spindle, until the pile could be suficiently compressed. Moreover in this manipulatlon' the machine was liable to be strained too much unless the operator was skillful enough and possessed the required delicate sense of feeling to judge of the proper amount of pressure.

Now in accordance with this invention 46 these difficulties are avoid y Providing the pressure producing screw shaft with steep, and not automatically locking threads. By this means automatic rotation of the screw spindle is prevented by the aid of suitable "stopping means adapted to secure the pressing spindle in its particular operating position. In a preferred construction frictionally acting arrestingmeans may be used for this purpose.

On the accompanying drawing an embodi- ,hand wheel 6 and the 475,654; and in Gama octobereo, i929.

ment of the-principles of the invention is shown by way of exemplification in Fig. 1 partly in elevation and Fig; 2 is a section on line The pile of paper or a a of Fig. 1. cardboard is compressed by the pressure beam 2 which is operated by a screw spindle 1. This spindle.

is provided with comparativeor screw shaft ly steep threads of about 16 degrees-pitch angle and pitch of about 25 millimeters transmitted to the casing 4 by means of the ball bearing 5. The casing'tis secured to the frame 10 of the machine.

-'At the upper end of the screw nut 3 a hand wheel 6 issecured by means of which the screw nut 3 may be turned, so as to raise or lower the spindle 1. By the rotation of the wheel 6 in the-direction of the arrow a: the

spindle is raised while on being rotated in the direction of the arrow y it is lowered. Any unintended automatic rotation of the screw nut 3 is prevented by frictional braking or locking means which in the exem lification shown comprises an arresting dog 7 and a hand lever 8.

- To the boss 402 of the casing 4 is pivotally connected the hand lever 8 on thebolt 9. The pawl or dog 7 is also pivoted on the bolt 9 and has a stud 8a which cooperates with the abutments 8b and 8c.

The spring 11 connects the casing 4 and the hand lever 8 and tends to rotate the latter in the direction x. The hand lever 8 bears with its abutment 8?) against thestud ea in the pawl 7 and forces the latter into the key groove within the hand wheel 6. In this position of the hand wheel 6, the hand wheel cannot be rotated in the direction 00 because the arresting dog or pawl 7 is jammed in the key groove ea and is more firmly jammed therein owing to the inclined position op'po site to the direction of rotation w. Sincethe nut 3 are secured topartly in section shaft is movable in a nut 3 gether, the latter is also prevented from rotation in the direction as. If the hand wheel 6 and the nut 3 respectively are rotated in the direction 00, a light pressure against the hand lever 8 is suflicient so that the abutment presses against the stud 8a and lifts the pawl or dog 7 out of the groove 6a.

The rotation of the hand wheel 6 in the direction 3 is always possible because the pawl 7 does not exert an 'arrestingaction but bears only withthe light pressure through the spring 11 in the groove 6a of the hand wheel"6.- o

The mode, of operation of the device issubstantially as follows If the pressure beam onto the pile from-its raised position a slight movement of A produce a suflicient rotation on the hand wheel to cause the pressure beam to become firm-1y seated on the pile which is thereby slightly compressed in consequence of the momentum of the force. For the full, complete compression however it will then require only a sudden, forcible, jerking move mentwith both hands and outstretched arms on the hand wheel, so that with two grasping steps the entire pressing operation is completed. Any return movement'of the pressure beam is prevented by the arresting of the dog 7 If after the performing of the cut the pressure beam is to be raised, a slight turning of the hand lever 8 by hand Will cause the arresting dog to be released which may even take place during the raising of the knife. As a result of the high compressing or the spindle 1.

pressure which keeps the pressure beam seated upon the pile the hand wheel with the spindle nut is automatically rotated towards the left, so as to cause the raising of the shaft has been sufficiently raised, the hand lever 8 is released-andthe movement of the pressure beam is stopped. Thus, the raising of the pressure beam is efiected automatically without necessitating any special expenditure of force, so that the pile is already exposed, before the'knife has reached its highest position, and thus by the device described the manipulation ofthe machine is facilitated and rendered more rapid. I

It should be understood that the device described is susceptible of various modifications and changes in accordance with varying conditions of its application, and without thereby deviating from the scope and spirit of the invention, as defined in the appended claims. a

I claim 1. In a cutting machine for paper, card- I board and the like in combination, a pressure beam, a spindle, operatively connected to the beam and having comparatively steep, sub stantially non-locking threads, rotatably and 2 has to be lowered the hand of the operator will After the pressure beam,

'frictionally operating locking and arresting means operatively engageable with the nut.

3. In a cutting machine for paper, cardboard andthe like in combination, a support,

paper-pressing means thereon, a spindle ops eratively connected to said means having threads thereon, ajscrewnut on the support surrounding and supporting the spindle, rotating means for the nut and frictionally operating locking means on the support engage:

able with the rotating means and adapted to arrest the same against rotation in a certain direction and manually operated actuatlng means I for lJlIGLlOCkHIg means.

In testimonyv whereof I affix my signature. -KARL STEGMANN. V

non-slidably mounted means for supporting 

